K&N Air Filters and Intakes - 2010 MUSTANG GT HIGH-FLOW K&N / FORD RACING AIR FILTER * K&N 4 ply panel washable air filter * Fits stock 2010 Mustang GT airbox. Will NOT fit 2005-2009. * Flows approximately 22% more than stock filter at 1.5" H2O delta pressure * Co-Engineered by K&N and Ford Racing * Does not require PCM recalibration